from water, hexane, cyclohexene, propanone, ethyl ethanoate, ethanol, trichloromethane. which are polar and which are non polar
2007-02-01 23:08:55 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
water = Polar
hexane = Non-Polar
cyclohexene = Polar
propanone = Polar
ethyl ethanoate = Polar
ethanol = Polar
trichloromethane = Polar.
2007-02-01 23:16:00 · answer #1 · answered by †ђ!ηK †αηK² 6 · 2⤊ 0⤋
Hopefully this description can help you understand what gives a compound polarity.
The non-polar: Hexane, cyclohexane
Polar: Propanone, water,ethyl ethanoate,ethanol, tricholormethane
What determines polarity is the electronegativity of the atoms. Electronegativity is defined simply as the ability of an atom to draw electron density closer to it from surrounding bonds. The atom with the higher electronegativity will have a partial negative charge and the lower will have a slightly positive charge. I dont know the numbers off-hand, but a chart should be made available to you. A general trend, though, is that when moving from the bottom left corner of the periodic table to the upper right corner, electronegativity increases. When there are large differences between the electronegativities of atoms in a compund, it is considered polar. I will explain each example for you
Hexane: This is non-polar because this compound is made up completely of carbon and hydrogens atoms. They're electronegativities are relatively similar, so there are no polar bonds.
Cyclohexane: Exactly the same as the previous, except in a ring,so nothing changes.
Propanone: This is slightly polar due to the carbonyl group(oxygen double bonded to a carbon) present in the molecule. Anytime oxygen is present in an organic compound, it will be slightly polar.
Ethyl ethanoate: This molecule is extremely polar due to an ester functional group (Carbon bonded to an oxygen bonded to another carbon. One of the carbons has another oxygen double bonded toit) Basically, the presence of two oxygens in this molecule makes it extremely polar.
ethanol: This molecule is also extremely polar due to the alcohol functional group(OH) . Anytime an OH is present among an organic compound, it will almost always be very polar.
Tricholomethane(Chloroform): This is slightly polar due to the polar interaction between the chlorine atoms and the central carbon atom.
Water: Extremely polar due to the interactions between the H atomsand the O atom.
Sorry if this got a little complicated, but I always liked to learn exactly why things happen the way they do. If you need any clarification, let me know
2007-02-02 09:36:56 · answer #2 · answered by jULIAN C 2 · 0⤊ 0⤋
Polar: water, ethanol, propanone,
Non-polar: hexane, cyclohexane, ethyl ethanoate, trichloromethane
2007-02-02 08:52:32 · answer #3 · answered by jov04sh 2 · 0⤊ 2⤋
polar:
water, propanone, ethanol, trichloromethane
non polar: hexane, cyclohexene, ethyl ethanoate
2007-02-02 07:36:10 · answer #4 · answered by Flongkoy 2 · 0⤊ 1⤋
i'm too lazy to figure out the structure of all of these compounds, so i'll just tell you the ones i already know.
water is polar
hexane is nonpolar
cyclohexene is nonpolar
the rest, i'm too lazy to figure out.
sorry? =)
2007-02-02 07:14:25 · answer #5 · answered by gamefreak 3 · 0⤊ 3⤋